CVE-2026-41126: Bigbluebutton

Medium severity, CVSS 4.3. EPSS: 0.3% chance of exploitation in the next 30 days.

BigBlueButton is an open-source virtual classroom. Versions prior to 3.0.24 have an Open Redirect through bigbluebutton/api/join via get-parameter "logoutURL." Version 3.0.24 has adjusted the handling of requests with incorrect checksum so that the default logoutURL is used. No known workarounds are available.

Affected products

• Bigbluebutton Bigbluebutton: before 3.0.24 (fixed in 3.0.24)

Published 2026-04-22. Last modified 2026-06-17.